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MoneyMitch 02-20-2013 09:26 PM

CO2 users
 
been doing some reading on co2 injection and was trying to come up with a diy build without yeast but with a pressure tank needle valve and a diffuser. question is where is good place to buy affordable pressure tanks and would a empty propane tank work to hold the co2?

OSagent23 02-21-2013 11:19 PM

Do you have a local gas area that provides the ability to refill CO2 in a canister? For instance in my neighborhood I have a local store called Airgas. They refill CO2 canister as well as sell them for a fairly decent price.

Aurie 02-22-2013 12:45 AM

The AirGas near me is having a sale till the end of the month for a 5lb tank plus the first fill is like $82 then I'm not sure how much to exchange it but it's under $20 I know that.. and on average if you use a regulator with a silenoid (on off switch) that tank could last like a year with not using CO2 at night when the plants don't need it. I'm saving up and can hopefully get a sale price before Feb 28th cause I can't seem to find any used CO2 tanks that still have their hydro tests. Some places won't exchange or refill without it.

fish monger 02-22-2013 04:17 AM

I used to use CO2 in a business. I had my tanks refilled at a fire extinguisher company. It was called Stop Fire. The tanks are a little pricey but, after the initial investment, refills are reasonable and should last a long time.

MoneyMitch 02-22-2013 12:26 PM

thanks for the info guys! just curious about a tank im trying to save in buying a tank since i have a few emtpy propane tanks alying around, i also have several co2 bottles for paintballs guns will any of these work in place of a "special" co2 tank?

fish monger 02-22-2013 04:39 PM

They'd probably work but, you might have trouble finding someone to fill them. Apparently, there are all kinds of regulations. The typical CO2 tank is built like a "tank".

MoneyMitch 02-22-2013 05:53 PM

picked up a regulator and needle valve and a soleioid at lowes and if i can use a old propane tank then im all set, gunna call around and see if i can get it filled now. im sure a propane tank is just as sturdy as a co2 tank seeing how well its a propane tank that keeps pressurised flammable gas lol but well see. im sure theres some law or regualtion but ill let you guys know!

fish monger 02-22-2013 06:47 PM

Sure hope it works out for you. You're right, seems strange that you can store propane in a certain tank, but not CO2.

Mikaila31 02-22-2013 07:09 PM

Highly highly doubt you will find a place to fill a propane tank with CO2. Most tanks are gas specific, same goes with regulators. I would be surprised if a CO2 regulator would fit a propane tank without some DIY modification to the regulator stem. Each different type of pressurized substance usually follows different guidelines (CGA numbers) to make it so a CO2 regulator fits only CO2 tanks. That way it avoids mistakes as regulators are gas specific and will not properly regulate gases they were not designed for.

edit: A standard CO2 regulator will fit a CGA-320 valve and that is all. Anything else would require replacement/ modification of the regulator stem. Propane tanks use a CGA-510 valve.

fish monger 02-22-2013 07:47 PM

Quote:

Originally Posted by Mikaila31 (Post 1441033)
Highly highly doubt you will find a place to fill a propane tank with CO2. Most tanks are gas specific, same goes with regulators. I would be surprised if a CO2 regulator would fit a propane tank without some DIY modification to the regulator stem. Each different type of pressurized substance usually follows different guidelines (CGA numbers) to make it so a CO2 regulator fits only CO2 tanks. That way it avoids mistakes as regulators are gas specific and will not properly regulate gases they were not designed for.

edit: A standard CO2 regulator will fit a CGA-320 valve and that is all. Anything else would require replacement/ modification of the regulator stem. Propane tanks use a CGA-510 valve.

That's what I was thinking but, wasn't sure. Very helpful post. Thank you..


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